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WO2017194743A1 - Dispositif de mélange et procédé pour mélanger au moins deux composants - Google Patents

Dispositif de mélange et procédé pour mélanger au moins deux composants Download PDF

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Publication number
WO2017194743A1
WO2017194743A1 PCT/EP2017/061471 EP2017061471W WO2017194743A1 WO 2017194743 A1 WO2017194743 A1 WO 2017194743A1 EP 2017061471 W EP2017061471 W EP 2017061471W WO 2017194743 A1 WO2017194743 A1 WO 2017194743A1
Authority
WO
WIPO (PCT)
Prior art keywords
actuating piston
mixing
mixing chamber
piston
channel
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/EP2017/061471
Other languages
German (de)
English (en)
Inventor
Isa-Henrika HEISEL
Armin Daniel
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Frimo Group GmbH
Original Assignee
Frimo Group GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Frimo Group GmbH filed Critical Frimo Group GmbH
Publication of WO2017194743A1 publication Critical patent/WO2017194743A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
    • B05B7/02—Spray pistols; Apparatus for discharge
    • B05B7/04—Spray pistols; Apparatus for discharge with arrangements for mixing liquids or other fluent materials before discharge
    • B05B7/0408—Spray pistols; Apparatus for discharge with arrangements for mixing liquids or other fluent materials before discharge with arrangements for mixing two or more liquids
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B15/00—Details of spraying plant or spraying apparatus not otherwise provided for; Accessories
    • B05B15/50—Arrangements for cleaning; Arrangements for preventing deposits, drying-out or blockage; Arrangements for detecting improper discharge caused by the presence of foreign matter
    • B05B15/55—Arrangements for cleaning; Arrangements for preventing deposits, drying-out or blockage; Arrangements for detecting improper discharge caused by the presence of foreign matter using cleaning fluids
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
    • B05B7/02—Spray pistols; Apparatus for discharge
    • B05B7/12—Spray pistols; Apparatus for discharge designed to control volume of flow, e.g. with adjustable passages
    • B05B7/1209—Spray pistols; Apparatus for discharge designed to control volume of flow, e.g. with adjustable passages the controlling means for each liquid or other fluent material being manual and interdependent
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
    • B05B7/02—Spray pistols; Apparatus for discharge
    • B05B7/12—Spray pistols; Apparatus for discharge designed to control volume of flow, e.g. with adjustable passages
    • B05B7/1254—Spray pistols; Apparatus for discharge designed to control volume of flow, e.g. with adjustable passages the controlling means being fluid actuated
    • B05B7/1263—Spray pistols; Apparatus for discharge designed to control volume of flow, e.g. with adjustable passages the controlling means being fluid actuated pneumatically actuated
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
    • B05B7/24—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas with means, e.g. a container, for supplying liquid or other fluent material to a discharge device
    • B05B7/2489—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas with means, e.g. a container, for supplying liquid or other fluent material to a discharge device an atomising fluid, e.g. a gas, being supplied to the discharge device
    • B05B7/2497—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas with means, e.g. a container, for supplying liquid or other fluent material to a discharge device an atomising fluid, e.g. a gas, being supplied to the discharge device several liquids from different sources being supplied to the discharge device
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B7/00—Mixing; Kneading
    • B29B7/74—Mixing; Kneading using other mixers or combinations of mixers, e.g. of dissimilar mixers ; Plant
    • B29B7/76—Mixers with stream-impingement mixing head
    • B29B7/7663—Mixers with stream-impingement mixing head the mixing head having an outlet tube with a reciprocating plunger, e.g. with the jets impinging in the tube
    • B29B7/7684—Parts; Accessories
    • B29B7/7689—Plunger constructions
    • B29B7/7694—Plunger constructions comprising recirculation channels; ducts formed in the plunger
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B7/00—Mixing; Kneading
    • B29B7/80—Component parts, details or accessories; Auxiliary operations
    • B29B7/802—Constructions or methods for cleaning the mixing or kneading device
    • B29B7/803—Cleaning of mixers of the gun type, stream-impigement type, mixing heads
    • B29B7/805—Cleaning of the mixing conduit, module or chamber part
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B7/00—Mixing; Kneading
    • B29B7/80—Component parts, details or accessories; Auxiliary operations
    • B29B7/802—Constructions or methods for cleaning the mixing or kneading device
    • B29B7/803—Cleaning of mixers of the gun type, stream-impigement type, mixing heads
    • B29B7/806—Cleaning of the discharge opening, e.g. orifice of the dispenser

Definitions

  • the invention relates to a mixing device, in particular a mixing head, and a spray mixing device, in particular a spray mixing head, for mixing and subsequent spraying of at least two reacting to a plastic components.
  • Spray heads and spray mixing heads of the type mentioned in the introduction are widely used in the spraying of workpieces in the production of contour-conforming plastic surfaces (so-called "spray skins"), whereby usually two or more components are mixed, which are mixed in a mixing chamber introduced into the mixing chamber, where they are at
  • a fluid can be introduced via a channel, whereby, for example, the mixing of the components in the mixing chamber can be intensified, but also the droplet size and speed can be influenced, whereby the spray pattern of the plastic can be optimized.
  • a separate channel for introducing a fluid to clean the mixing chamber while the spray mixing head is at rest is provided.
  • Production cycle time of a spray skin may be particularly advantageous in very differently shaped components (such as. An instrument panel with very narrow areas in the scoop, but otherwise quite large and little shaped surfaces), if the discharge capacity of the spray material can be varied as much as possible during a spraying process ,
  • a mixing device for mixing at least two reactive components of a plastic and dispensing the mixture.
  • the mixing device comprises: a main body having a bore extending in the axial direction, a mixing chamber for mixing at least two reactive components to produce a plastic, and dispensing the mixture, in particular to a spraying device for spraying the Mixture, at least one channel for at least temporary introduction of fluid, in particular compressed air and / or cleaning fluid and / or cleaning fluid, wherein the channel has an outlet opening through which the channel is at least temporarily connected to the mixing chamber, a first actuating piston in the bore the main body is arranged so displaceable in the axial direction that can be switched by the displacement of the first actuating piston between an operating position in which the components of the plastic can be introduced into the mixing chamber, and a rest position.
  • the invention is characterized by a second actuating piston, which is so arranged independently displaceable relative to the first actuating piston, that by the displacement of the second actuating piston between a Fluidzutagen ein in which the outlet opening is at least partially open, and a closed position in which the second actuating piston Outlet opening closes, regardless of the position of the first actuating piston can be switched.
  • the present invention can i.a. to provide the following benefits:
  • Constant required activation energy to initiate the reaction of the mixture and to obtain the desired properties of the reaction product and / or
  • the device may be characterized by a heating device with which the fluid is heated.
  • the compressed air tempered gas to optimize mixing and reaction behavior, as well as to load the components of the plastic during the spraying process in the operating position of the actuating piston, as well as for cleaning the spraying device in the rest position of the actuating piston, wherein a supply of gas or liquid detergent he follows.
  • a spray mixing device for mixing at least two reactive components of a plastic and spraying a mixture thereof with the mixing device according to the present invention, a spraying device, in particular a spray head, for spraying the mixture and preferably a control unit for controlling the movement of the first and provided second actuating piston.
  • the spraying device may, for example, have a nozzle and / or a spray lance.
  • a method for mixing at least two reactive components of a plastic and dispensing a mixture thereof preferably using the mixing device according to the invention or the spray mixing device according to the invention, wherein the following steps are carried out: supplying at least two components, in particular two reactive components for the production a plastic, via a respective feed into a mixing chamber, wherein a first actuating piston is in an operating position, and mixing, preferably also heating, the two components in the mixing chamber by introducing fluid, in particular compressed air, into the mixing chamber via a channel and an outlet opening through which the channel is connected to the mixing chamber.
  • the introduction of fluid means that a pressurized and heated fluid is introduced into the mixing chamber at a preferably variable volume flow.
  • a second adjusting piston is preferably located in a fluid supply position in which the outlet opening is at least partially open.
  • Fluid volume flow even at extremely different discharge performance of the plastic forming reactive components, achieve optimal mixing.
  • a pressurized and tempered fluid in variable volume flows as a function of the volume flows of at least two reactive raw materials can be defined and reproducible viscosities and flow rates of the total mixture to the spray head, in particular to the outlet opening of the spray nozzle, achieve and thus a defined and Consistent atomization and spray cone formation.
  • a defined temperature introduction into the mixing chamber and by constant temperature maintenance in the mixing chamber constant and optimal reaction sequences can be realized, even with extremely different discharge rates of the components forming the plastic.
  • the use of the mixing device according to the invention and the spray mixing device according to the invention is provided, wherein the first actuating piston is displaced and thereby the second actuating piston is displaced by the movement of the first actuating piston that the Relative arrangement between the first and second actuator piston remains unchanged.
  • a second actuating piston can be moved independently of the first actuating piston such that regardless of the position of the first actuating piston, the fluid supply takes place or can not be done, i. that regardless of the position of the first actuating piston, the outlet opening can be opened and closed by the second actuating piston.
  • the independent mobility of the second actuating piston in particular means that even during the displacement of the first actuating piston from the operating position to the rest position (and vice versa) fluid can be introduced via the channel.
  • the mixing device may have at least two feeds for at least temporarily feeding the components of the plastic into the mixing chamber.
  • the feeders are not connected to the mixing chamber.
  • the first actuating piston ie during the spraying process
  • switch fluid on and off by bringing the second actuating piston into the fluid supply position or closed position accordingly.
  • a displacement of the first actuating piston is not necessary. Due to the sole movement of the second actuating piston, it is possible during the spraying operation, that is, during the first actuating piston in the operating position, to change the supply of fluid, for example to throttle or to increase.
  • the at least temporary connection between the feeders and the mixing chamber or between the channel and the mixing chamber is to be understood in particular as meaning that this connection must be possible in at least one working position.
  • the supply of the components of the plastic via the feeds into the mixing chamber in the working position is possible, in which the first actuating piston is in the operating position.
  • the channel is connected in particular in the working position with the mixing chamber, in which the second adjusting piston is in the fluid supply position.
  • the feeders are connected to the mixing chamber such that the components of the plastic can be introduced into the mixing chamber.
  • the connection between the feeders and the mixing chamber is interrupted by the first adjusting piston, so that the feeders are not connected to the mixing chamber.
  • the outlet opening is spaced from the second actuating piston and thereby at least partially open, so that the fluid can be introduced into the mixing chamber, especially if the first actuating piston is in the operating position.
  • the closed position in which the second actuating piston closes the outlet opening, the connection between the channel and the mixing chamber is interrupted and no fluid can be introduced into the mixing chamber via the channel.
  • more than two feeds may be provided in the mixing device; especially if more than two components are used for the plastic.
  • Mixing the components in the mixing chamber means that first the components are introduced into the mixing chamber and can be mixed therein. Complete mixing of the components can also take place only when fluid is introduced, possibly also outside the actual mixing chamber.
  • first and second actuating pistons are arranged such that they can be displaced independently of one another such that both in the operating position and in the rest position of the first actuating piston the second actuating piston can be in both the fluid supply position and the closed position.
  • This can in any way the operating position with the Fluidzu211 ein and the closed position, and also the rest position of the first actuating piston with the
  • Fluidzu Humangnagna and the closed position of the second Stellkolbens are combined, so that a great variability and flexibility with respect to the control of the mixing device is given.
  • the first actuating piston can have a bore in the axial direction and the second actuating piston can be displaceably arranged in the bore of the first actuating piston in the axial direction.
  • the second actuating piston can be arranged coaxially with the first actuating piston.
  • an embodiment is preferred in which the second actuating piston is arranged relative to the first actuating piston such that the relative arrangement between the first and second actuating piston remains unchanged, while the first actuating piston is displaced between the operating position and the rest position.
  • this embodiment is an embodiment in which the second actuating piston is entrained by the movement of the first actuating piston.
  • the first and second actuating piston can be designed as a valve, in particular a needle valve, for switching between the fluid supply position and the closed position, and / or the outlet opening of the channel can be arranged on the first actuating piston.
  • the supply of fluid may be advantageous.
  • advantages in terms of the flow behavior of the fluid can be expected through individual outlet opening geometries.
  • the exit opening of the channel can automatically move with the movement of the first actuating piston.
  • the mixing device is preferably designed such that at least in the operating position of the first actuating piston and the fluid supply position of the second piston fluid can be introduced into the mixing chamber on one side of the mixing chamber, which is arranged in the outlet direction of the mixture from the mixing chamber at the downstream end of the mixing chamber.
  • the point at which the fluid is introduced into the mixing chamber is opposite to the side of the mixing chamber at which the mixture exits the mixing chamber. This allows the fluid to act optimally on the mixing process and the output of the mixture.
  • the fluid provides for a loading of the reactive components with the fluid (gas) and thus for the reduction of the product density, ie a weight reduction of the finished part / the spray skin.
  • the first actuating piston is in the rest position, effectively different fluids, in particular compressed air or alternatively cleaning fluid, are introduced for cleaning.
  • the channel is at least partially provided extending along the second actuating piston.
  • a particularly advantageous introduction of the fluid is possible in the mixing chamber, wherein an advantageous construction of the mixing device is possible.
  • the channel can extend at least in sections between the second control piston and the first control piston, when the second control piston is arranged in the first control piston.
  • a feed line for introducing fluid into the channel may be provided, the feed line extending at least in sections through the first setting piston and / or being formed at least in sections as a groove (18b) in the main body (2).
  • the supply line can be a common supply line for introducing fluid into the channel and for displacing the second setting piston into the fluid supply position along the axial direction.
  • the second control piston can be displaced from the closed position into the fluid supply position along the axial direction and at the same time fluid can be carried into the channel via the outlet opening opened in the fluid supply position.
  • the inventive method is designed such that the second actuating piston is brought into a closed position in which the second closing piston closes the outlet opening, wherein the first actuating piston is in the operating position.
  • This allows a simple way to stop the supply of fluid while the mixing device remains in the operating state.
  • the first actuating piston can be moved from the operating position to the rest position and thereby remain the second actuating piston in the Fluidzu1700.
  • This allows cleaning of the closed mixing chamber and the spray head without having to interrupt the supply of fluid through the channel.
  • This cleaning can be carried out during a spray program as a spray application interruption by gas or after a spray program by blowing the spray mixing head by gas or alternatively liquid detergent.
  • the first actuating piston can be moved and fluid flow continuously during the switching through the channel.
  • This apparatus is for mixing at least two reactive components of a plastic and dispensing a mixture thereof, the apparatus comprising: a main body having a bore extending in the axial direction, a mixing chamber for mixing the components for the plastic and for dispensing the mixture, in particular to a spraying device for spraying the mixture, at least one channel for at least temporarily introducing fluid, in particular compressed air and / or cleaning fluid, into the mixing chamber, wherein the channel has an outlet opening via the the channel is at least temporarily connected to the mixing chamber, a first actuating piston, which is arranged in the bore of the main body in the axial direction so displaceable that by the displacement of the first actuating piston between a
  • Heating device for heating the fluid.
  • the heating device is arranged outside the mixing device.
  • the heater may be formed as a heating coil, which is arranged for example in a fluid line, in particular compressed air line.
  • Previously mentioned aspects or features of subclaims 2 to 10 and also the embodiment according to claim 1 can be used as preferred embodiments of the device according to claim 17.
  • the device according to claim 17 can also be used in the method according to one of claims 11 to 16.
  • Fig. La shows a sectional view through a mixing device according to the invention in a first working position
  • Fig. Lb shows another sectional view of the mixing device according to the invention in the first working position
  • FIG. 2a shows a sectional view according to FIG. 1a through the mixing device according to the invention in a second working position
  • FIG. 2b shows a sectional view according to FIG. 1b of the mixing device according to the invention in the second
  • FIG 3a shows a sectional view according to FIGS. 1a and 2a through the mixing device according to the invention in a third working position;
  • Fig. 3b shows a sectional view according to Fig. Lb and 2b of the mixing device according to the invention in the third
  • the figures represent sectional views of a mixing apparatus 1 having a main body 2 through which a bore 3 extends in the axial direction A.
  • a first adjusting piston 7 is arranged, which is displaceable in the axial direction A.
  • the first adjusting piston 7 in turn has a bore 9 in which a second adjusting piston 8 is mounted displaceably in the axial direction A.
  • the mixing device 1 has a mixing chamber 4 for mixing components for the plastic and for dispensing the mixture.
  • a spraying device (not shown) for spraying the mixture may be attached to the mixing chamber.
  • the mixing device 1 shown in the figures has a receptacle 10 for a spraying device for spraying the mixture.
  • a state or a working position of the mixing device 1 is shown in which both the first actuating piston 7 and the second actuating piston 8 are in an advanced position.
  • the advanced positions correspond to the rest position of the first actuating piston 7 and the closed position of the second actuating piston eighth
  • the mixing chamber 4 consists only of the area which is not occupied by the first adjusting piston 7 or of elements connected to the adjusting piston 7. It is also conceivable that the mixing chamber 4 is completely occupied in the rest position of the first actuating piston 7 of the first actuating piston 7, so that there is substantially no mixing chamber 4 in the rest position of the first actuating piston 7.
  • FIGS. 2 a and 2 b a second state or a second working position of the mixing device is shown, in which the first Control piston 7 is in the operating position and the second actuating piston 8 is in the closed position. That is, in the second state, the first actuator piston 7 is in the retracted position, but the second actuator piston 8 is in the advanced position.
  • the mixing chamber 4 is (completely) formed, since now also in the rest position by the first actuating piston 7 (or by associated elements) occupied area is exposed. Consequently, in the second state, mixing of the components of the plastic may occur, but without supplying fluid through the channel 6 into the mixing chamber 4.
  • Figures 3a and 3b show a third state and a third working position of the mixing device 1, wherein the first actuating piston 7 in the operating position (ie the retracted position) and the second actuating piston 8 in the FluidzuScience ein (ie the retracted position).
  • this third state can thus take place a supply of the components of the plastic in the mixing chamber 4, while additionally introduced via the channel 6 in the mixing chamber 4 fluid for intensive mixing of the components, as well as for a gas loading of the mixture to reduce the density of the plastic (The weight of the spray skin), as well as for an increase in volume of the mixture in the spray head for optimal Sprühkegel theory provides.
  • a fourth state or a fourth working position is possible, which is not shown in the drawings;
  • the first actuating piston 7 in the advanced position (as shown in Fig. 1), but the second control pistons 8 in the retracted position (as shown in Fig. 3).
  • cleaning may be performed by flowing fluid through the channel 6 into the mixing device.
  • the two feeds 5a, 5b are provided for at least temporarily feeding the components of the plastic into the mixing chamber 4.
  • one component is polyol and the other component is isocyanate.
  • the mixing device 1 has the channel 6 for at least temporary introduction of fluid (in particular compressed air) into the mixing chamber 4, wherein the channel 6 has an outlet opening 19, via which the channel 6 is connected to the mixing chamber 4, or at which the channel 6 opens into the mixing chamber 4.
  • fluid in particular compressed air
  • the mixing device 1 has the second actuating piston 8, which is so independent relative to the first actuating piston 7 slidably disposed that by the displacement of the second adjusting piston 8 between the Fluidzutagen ein in which the outlet opening 19 spaced from the second actuating piston 8 and thereby at least partially open, so that the fluid can be introduced into the mixing chamber 4, and a closed position can be switched in which the second adjusting piston 8 closes the outlet opening 19, so that the connection between the channel 6 and the mixing chamber 4 is interrupted and no fluid can be introduced into the mixing chamber 4 via the channel 6.
  • Appropriate injection devices IIa, IIb, through which the components of the plastic are injected, can be connected to the supply openings 5a, 5b.
  • the mixing device 1 or the main body 2 has, in the embodiment shown in the figures, return grooves 13a, 13b and return bores 12a, 12b which extend outwardly through the main body 2.
  • the arrangement of these components is such that the plastic components supplied by the two supply lines 5a, 5b receive the components of the plastic in the case in which the first actuating piston 7 is in the rest position, the return groove 13a, 13b formed in the first actuating piston 7 receives and supplies the components of the plastic the return bore 12a, 12b passes, so that the components can, for example, flow back into a collection tank.
  • One advantage is that the components can always be kept in motion and circulated and not come to a standstill and cure in the feeders.
  • the outlet opening 19 is arranged directly at the end of the first adjusting piston 7, on which the first adjusting piston 7 adjoins the mixing chamber 4.
  • the first actuating piston 7 is driven accordingly. This is done in the embodiment shown in the figures via the port 14, via the example. Compressed air is introduced, whereby the first actuating piston 7 is urged from the advanced position to the retracted position.
  • the reverse movement of the first actuating piston 7, namely the movement from the retracted position to the advanced position, can be done by pressurizing the port 15, for example with compressed air.
  • the movement of the second actuating piston 8 from the advanced position to the retracted position takes place via a drive, which, for example, can be designed as a (pneumatic) connection 16, as shown in FIG. 3 a.
  • a drive which, for example, can be designed as a (pneumatic) connection 16, as shown in FIG. 3 a.
  • fluid is introduced through the supply line 18 into the channel 6 between the first control piston 7 and the second control piston 8, whereby the second control piston 8 is urged in the retracted position.
  • Fluidzu 1500 ein to the closed position can be done by introducing compressed air into the port 17, whereby the second actuating piston 8 is urged in the advanced position.
  • the reference numerals 14-17 thus represent fluid drives for the first and second actuating pistons. They can be pneumatic or hydraulic, also variously.
  • the first 7 and second 8 control pistons are independently displaceable and independently controllable, wherein both in the operating and the rest position of the first actuating piston 7, the second control piston 8 may be in both the Fluidzu 1500 ein and the closed position.
  • the first actuating piston 7 has a bore 9 in the axial direction A and the second actuating piston 8 is arranged displaceably in the bore 9 of the first actuating piston 7 in the axial direction A, in particular such that the second actuating piston 8 is arranged coaxially to the first actuating piston 7.
  • the second control piston 8 is received within the first control piston 7, in particular such that the second control piston 8 is completely surrounded by the first control piston 7 and the second control piston 8 in the interior of the first control piston 7 is movable in the axial direction.
  • the first 7 and second 8 control pistons are designed as a valve, in particular needle valve, wherein the valve is open when the second actuating piston 8 is in the fluid supply position, and the valve is closed when the second actuating piston 8 is in the closed position.
  • the outlet opening 19 of the channel 6 is arranged such that at least in the operating position of the first actuating piston 7 fluid can be introduced into the mixing chamber 4 on one side of the mixing chamber 4, which viewed in the outlet direction A of the mixture from the mixing chamber 4 at the downstream end the mixing chamber 4, viewed in the flow direction is therefore arranged at the beginning of the mixing chamber.
  • the flow and exit direction A of the mixture is the axial direction A, which points to the left in the figures.
  • the channel 6 extends along the second adjusting piston 8, in particular the piston rod 8b in the axial direction A, wherein the channel 6 is located between the second adjusting piston 8 and the first adjusting piston 7.
  • the Channel 6 of the first actuating piston 7 and the second actuating piston 8 is formed or limited.
  • a supply line 18 is designated, is introduced via the fluid in the channel 6 from outside the mixing device 1.
  • the supply line 18 or a part 18b thereof extends at least in sections through the first adjusting piston 7.
  • the feed line 18 or a part 18a thereof may be formed in a groove shape in the main body 2.
  • the groove 18a is dimensioned in the axial direction so that it is always in communication with the part of the supply line 18b which extends through the first adjusting piston 7, so that the supply of fluid through the supply line 18a, 18b into the channel 6 both in the retracted position of the first actuating piston 7 (as shown in FIGS. 2 and 3) and in the advanced position of the first actuating piston 7 (as shown in FIG. 1) is possible.
  • the length of this groove 18 in the axial direction is thus at least the length by which the first actuating piston 7 moves axially from the advanced (i.e.
  • Operating position is displaceable.
  • the supply line 18 is a common supply line for introducing fluid into the channel 6 and for displacing the second adjusting piston 8 into the fluid supply position along the axial direction A.
  • FIGS. 2a and 3a it can be seen that by introducing fluid into the port 16, the fluid extends through the supply line 18 into the channel 6 and initially by the pressure increase in the channel 6, the second actuating piston 8 so far to the right, until the second actuating piston 8 in the retracted position, ie the Fluidzutagen ein located. The further fluid introduced through the port 16 can then flow via the channel 6 and the opened outlet opening 19 into the mixing chamber 4.
  • a spray mixing device for mixing and spraying the mixture
  • a spraying device in particular a spray head (not shown), for spraying the mixture to the receptacle 10 is attached.
  • a control unit for controlling the movement of the first and second actuating piston, and for selecting between (usually) liquid or gaseous fluid for mixing and loading the components of the plastic or for cleaning the spray mixing head in this spray mixing device provided be.
  • a step can be performed in which the first actuating piston 7 is moved from the operating position to the rest position and thereby the second actuating piston 8 remains in the Fluidzu211.
  • This allows, for example, the direct transition of mixing and spraying of plastic for cleaning the device 1 by the fluid.
  • spray interruptions can also be realized during a spray program, for example when a robot is traveling over a surface that is not to be sprayed.
  • the first actuating piston 7 When switching between the mixing of the components of the plastic in the mixing chamber (when the first actuating piston 7 is in the operating position) and the cleaning of the mixing chamber (when the first actuating piston 7 is in the rest position), the first actuating piston 7 is moved while fluid continuously during the switching through the channel 6 can flow.
  • the mixing device can be operated or used such that the first actuating piston 7 is displaced and thereby the second actuating piston 8 is displaced by the movement of the first actuating piston 7 such that the relative arrangement between the first and second actuating piston remains unchanged. That is, the movement of the first actuating piston 7 is the cause of the (automatically simultaneously taking place) movement of the second actuating piston eighth

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Nozzles (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)

Abstract

Dispositif de mélange (1), en particulier tête de mélange, pour mélanger et distribuer un mélange, caractérisé par un deuxième piston de réglage (8) qui est agencé de manière à pouvoir être déplacé indépendamment par rapport à un premier piston de réglage (7) de telle sorte que le déplacement du deuxième piston de réglage (8) permette de passer alternativement entre une position d'amenée de fluide, dans laquelle un orifice de sortie (19) est au moins partiellement ouvert, et une position de fermeture, dans laquelle le deuxième piston de réglage (8) ferme l'orifice de sortie (19), indépendamment de la position du premier piston de réglage (7).
PCT/EP2017/061471 2016-05-12 2017-05-12 Dispositif de mélange et procédé pour mélanger au moins deux composants Ceased WO2017194743A1 (fr)

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DE102016208191.8 2016-05-12
DE102016208191.8A DE102016208191A1 (de) 2016-05-12 2016-05-12 Mischvorrichtung und Verfahren zum Mischen zumindest zweier Komponenten und Ausgeben eines Gemisches davon

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111451222A (zh) * 2020-03-18 2020-07-28 成都东日瑞姆机械有限公司 可添加粉末组分多流道浇注的聚氨酯发泡设备

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115681672B (zh) * 2022-10-24 2024-07-23 中国科学院光电技术研究所 一种核辐射环境下的金属管道修复机器人

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0040371A1 (fr) * 1980-05-14 1981-11-25 Bayer Ag Tête d'injection pour têtes de mélange destinée à la production d'un mélange réactionnel pour l'obtention d'une substance homogène ou d'une mousse à partir d'au moins deux composants de matières réactionnelles
EP0090257A2 (fr) * 1982-03-25 1983-10-05 BASF Aktiengesellschaft Dispositif pour la production d'un mélange chimiquement réactif d'au moins deux composants plastiques liquides
EP0144517A2 (fr) * 1983-12-13 1985-06-19 Herbert Dietachmair Pistolet pour le mélange d'un matériau à plusieurs composants réactifs
DE102011079982A1 (de) 2011-07-28 2013-01-31 Frimo Group Gmbh Sprühkopf für reaktive Kunststoffe

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DE3335786A1 (de) * 1983-10-01 1985-04-11 Maschinenfabrik Hennecke Gmbh, 5090 Leverkusen Mehrstoffduese zum zusammenfuehren mindestens zweier fliessfaehiger, kunststoff, insbesondere schaumstoff bildender reaktionskomponenten zum zwecke des einleitens der reaktion durch vermischen
JP3734752B2 (ja) * 2001-12-26 2006-01-11 本田技研工業株式会社 液体混合装置
US20110019498A1 (en) * 2009-07-21 2011-01-27 Huiber Otto A Mixing Head For Reaction Injection Molded Materials
ES2644970T3 (es) * 2009-12-22 2017-12-01 Fundacion Inasmet Procedimiento y dispositivo para polimerizar lactamas en moldes

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0040371A1 (fr) * 1980-05-14 1981-11-25 Bayer Ag Tête d'injection pour têtes de mélange destinée à la production d'un mélange réactionnel pour l'obtention d'une substance homogène ou d'une mousse à partir d'au moins deux composants de matières réactionnelles
EP0090257A2 (fr) * 1982-03-25 1983-10-05 BASF Aktiengesellschaft Dispositif pour la production d'un mélange chimiquement réactif d'au moins deux composants plastiques liquides
EP0144517A2 (fr) * 1983-12-13 1985-06-19 Herbert Dietachmair Pistolet pour le mélange d'un matériau à plusieurs composants réactifs
DE102011079982A1 (de) 2011-07-28 2013-01-31 Frimo Group Gmbh Sprühkopf für reaktive Kunststoffe

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111451222A (zh) * 2020-03-18 2020-07-28 成都东日瑞姆机械有限公司 可添加粉末组分多流道浇注的聚氨酯发泡设备

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